
/**
 * buffer[0]    -bit0: Left button
 *              -bit1: Right button
 *              -bit2: Middle button
 * buffer[1] - Cursor movement X axis -127~127 
 * buffer[2] - Cursor movement Y axis -127~127 
 * buffer[3] - Wheel vertical movement -127~127
*/
//物理坐标系: 坐标原点为屏幕左上角，向右平移，X 坐标 递增，向下平移，Y 坐标递增
uint8_t buffer[4] = {0x00, 10, 10, 0x00};//向右下方（与 x 轴 夹 45°）